CHICAGO – Zoran Planinic is frustrated about his playing time. But the Nets rookie is more frustrated with himself than with the coaching staff that keeps him on the bench.

“I got my chances, I didn’t do so good. So that is the reality,” said Planinic, who totaled 16 minutes in the Nets’ eight games prior to last night’s meeting with the Bulls. “I am disappointed, but it is what it is. At the same time, I need to practice harder.”

How low Planinic slipped is seen by the Nets signing well-traveled point guard Anthony Goldwire to a 10-day contract Monday.

“Zoran is going to be a very good player. He needs experience in order to get better,” Lawrence Frank said. “He’ll continue to improve; no one has soured on him. We want to see what else is out there. But Zoran is going to be a very good player in time.”

Planinic, the Nets’ first-round pick this summer, said he knows he’ll get more chances and that he must do more with them.

“Some games I feel comfortable, some games I feel lost,” he said. “That is the experience. In time, I will have every game played the same way. For now, some games I play good, some games I play terrible. With experience it will come.”

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Kenyon Martin said, “I’m not playing any time this week,” and added that his tendinitis-stricken left knee feels “a little better” since he began resting it last week. “I’m just trying to get some movement in it so it don’t get too stiff,” he said . . . Jason Collins rejoined the team after attending funeral services for his grandmother.

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Goldwire has been with Minnesota and Milwaukee previously this season, along with Yakima in the CBA. He was drafted in ’94 by the Suns but never played for them. With CBA and ABA stops along with stints in Greece and Spain, Goldwire also played for the Hornets, Nuggets, Spurs and Wizards. He was signed but not used by the Cavs.